SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Cel):
260
Qualification Status:
Not Qualified
Seated Height-Max:
1.2 mm
Supply Current-Max (Isup):
1.3 mA
Supply Voltage-Nom (Vsup):
12 V
Surface Mount:
YES
Switcher Configuration:
BUCK
Switching Frequency-Max:
700 kHz
Temperature Grade:
OTHER
Terminal Finish:
Nickel/Palladium/Gold (Ni/Pd/Au)
Terminal Form:
GULL WING
Terminal Pitch:
0.65 mm
Terminal Position:
DUAL
Time@Peak Reflow Temperature-Max (s):
30
Width:
4.4 mm
TPS54429PWP Frequently Asked Questions (FAQs)
Texas Instruments provides a recommended PCB layout in the datasheet, but it's also important to follow general high-frequency PCB design guidelines, such as keeping the power traces short and wide, using a solid ground plane, and minimizing vias and thermal reliefs.
The output capacitor selection depends on the output voltage, output current, and desired ripple voltage. A general rule of thumb is to choose a capacitor with a capacitance value of at least 10uF to 22uF, and a voltage rating of at least 1.5 times the output voltage. Additionally, consider the capacitor's ESR, ESL, and ripple current rating.
While the datasheet specifies a maximum input voltage of 5.5V, it's recommended to derate the input voltage to 5V or lower to ensure reliable operation and to prevent damage to the device.
The TPS54429PWP has a built-in OCP feature that can be enabled by connecting the OCP pin to a resistor divider network. The OCP threshold can be set by selecting the appropriate resistor values. Additionally, the device also has a hiccup mode that can be enabled to prevent damage during overcurrent conditions.
The TPS54429PWP has a thermal derating of -1.5%/°C above 25°C. This means that the device's output current capability will decrease as the temperature increases. It's essential to consider this derating when designing the system to ensure reliable operation.
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TPS54429PWP Overview
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
